Sole structure of working shoe

ABSTRACT

A sole structure of working shoe has an upper and a sole bonded by a stitching. A front portion according to the toes and extended from the surface of the sole has an overall size which is smaller than the sole. A gadroon forms along the outer periphery of the heel portion of the sole, and the gadroon has a quite depth for stitching so that the stitching stitches the sole under the upper along the contour of the sole. Furthermore, the gadroon is filled up with a welt, and the welt covers the stitching in the gadroon.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a sole structure of working shoe, andmore particularly to a sole that is stitched to an upper by a stitchingalong the contour of the sole with uniform stitching thickness in orderto increase the strength of the sole structure.

2. Description of Related Art

A conventional working shoe is designed for some dangerous workingenvironments, like a welding plant, a high temperature environment, anda slippery condition.

Referring to FIG. 1, a conventional working shoe has an upper 11, amiddle sole 12, a lower sole 13, and a heel 14. The upper 11 is stitchedto the middle sole 12 by a stitching 15. The lower sole 13 gums to themiddle sole 12, and at last the heel 14 gums to the lower sole 13.However, in some special environments, the working shoes have to providewaterproof, heatproof, greaseproof, and skidproof functions, but thebinding method of conventional arts of working shoes has problemsbecause the gum, bonding each layer of the sole, would be melted underthe hot condition. Besides, in the other method of one conventional artthat the lower sole 13 is stitched to the middle sole 12 by a stitching15, the stitching 15 is directly stitched along the contour of the lowersole 13 and is not covered so that the stitching 15 would be worn moreoften during the working in dangerous environments and it would lead todiminish the utility of the working shoes.

Taiwan Patent Application No. 89207471, which is filed by the presentinventor, discloses a sole structure of working shoe. Referring to FIG.2, the sole structure of working shoe has an upper 31 stitched to theperiphery of a sole 32 by a stitching 35. The sole 32 has a heel 33,according to the heel, and a front portion 34, according to the toes,which are extended from the surface of the sole 32. Each overall size ofthe heel 33 and the front portion 34 is smaller than the overall size ofthe sole 32, and therefore the stitching 35 would be stitched along theedge of the sole 32.

To overcome the shortcomings, the present invention tends to provide asole structure of working shoe to mitigate the aforementioned problems.

In order to alleviate the aforementioned problems of the conventionalarts, a sole structure of working shoe is designed meticulously. On thebasis of inventor's practice according to the work, the presentinvention is useful, and it can solve the problems and limits of theconventional arts.

To attain the above-stated object, in a sole structure of working shoehaving an upper which is stitched to the periphery of the sole by astitching, and the characteristic is that a gadroon forms along theouter periphery of a part of the sole where the heel portion extended.The result is that the gadroon has a quite depth for stitching so thatthe stitching stitches the sole under the upper along the contour of thesole with uniform stitching thickness.

About a preferred embodiment of the present invention, the solestructure of working shoe having an upper which is stitched to theperiphery of the sole by a stitching, and the characteristic is that agadroon forms along the outer periphery of a part of the sole where theheel portion extended and a front portion according to the toes andextended from the surface of the sole has an overall size which issmaller than the sole. The result is that the gadroon has a quite depthfor stitching and the stitching would be stitched along the contour ofthe sole with uniform stitching thickness.

The present invention has improvements described as follows. First, thewhole sole is bonded with the upper by a stitching, and therefore itwould never have problems about the gum. Moreover, the stitching wouldnot contact the ground directly and be protected from wear. Finally, thepresent invention not only improves the strength of the bond andprevents the damage of the wear but also makes the users morecomfortable.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more fully explain the features and advantages of thepresent invention, the following preferred embodiments of a shoeaccording to the invention are described, as examples only without anylimitative character, with reference to the accompanying drawings, inwhich:

FIG. 1 is a perspective view of a conventional sole structure of workingshoe;

FIG. 2 is a plan view of another conventional sole structure of workingshoe;

FIG. 3 is a perspective view of a preferred embodiment of the solestructure of working shoe of the present invention;

FIG. 4 is a sectional view according to the heel of the shoe of FIG. 3;

FIG. 5 is a perspective view of another preferred embodiment of the solestructure of working shoe of the present invention;

FIG. 6 is a front view of the shoe of FIG. 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 3, a sole structure of working shoe in accordance withthe present invention has an upper 1 that is stitched to the peripheryof the sole 2 by a stitching 22 f.

The sole 2 has a lower sole 22, constructed by a front portion 22 a, ashank 23, and a heel portion 22 b. The front portion 22 a, according tothe toes, and the heel portion 22 b, according to the heel, are extendedfrom the surface of the sole 2. The shank 23 is hung in the air becausethe heel portion 22 b is thicker than the front portion 22 a. Referringto FIG. 4, a gadroon 22 c forms along the outer periphery of a part ofthe sole 2 where the heel portion 22 b extended, and the gadroon 22 chas a quite depth for stitching so that the stitching 22 f stitches thesole 2 under the upper 1 along the contour of the sole 2 with uniformstitching thickness.

Referring to FIGS. 5 and 6, the sole structure of working shoe inaccordance with the present invention wherein the gadroon 22 c is filledup with a welt 22 g. The welt 22 g is a decoration and makes the shoesfancy. Furthermore, the welt 22 g can prevent the gadroon 22 c dirty andprotect the stitching 22 f from wear. Finally, the welt 22 g can reflectlight in the dark to improve the safety of the users.

Referring to FIG. 7, the sole structure of working shoe in accordancewith the present invention wherein the front portion 22 a forms anannular portion 22 d surrounding an inner portion 22 e. The annularportion 22 d is the surrounding part of the front portion 22 a, and theinner portion 22 e is the other part, the inner part, of the frontportion 22 a. The inner portion 22 e is thicker than the annular portion22 d so that the stitching 22 f stitches the sole 2 under the upper 1along the contour of the sole 2 with uniform stitching thickness.

About the said sole structure of working shoe of the present invention,the upper 1 is stitched to the sole 2 along the contour of the sole 2 bythe stitching 22 f with uniform stitching thickness so that thecombinative strength of the upper 1 and the sole 2 is stronger and donot be degummed.

It is to be understood, however, that even though numerouscharacteristics and advantages of the present invention have been setforth in the foregoing description, together with details of thestructure and function of the invention, the disclosure is illustrativeonly, and changes may be made in detail, especially in matters of shape,size, and arrangement of parts within the principles of the invention tothe full extent indicated by the broad general meaning of the terms inwhich the appended claims are expressed.

1. A sole structure of working shoe comprising an upper and a solebonded by a stitching, a gadroon forming along the outer periphery ofthe heel portion of the sole, and the gadroon having a quite depth forstitching so that the stitching stitches the sole under the upper alongthe contour of the sole.
 2. The sole structure of working shoe asclaimed in claim 1, wherein the gadroon is filled up with a welt, andthe welt covers the stitching in the gadroon.
 3. A sole structure ofworking shoe comprising an upper and a sole bonded by a stitching, afront portion according to the toes and extended from the surface of thesole has an overall size which is smaller than the sole; a gadroonforming along the outer periphery of the heel portion of the sole, andthe gadroon having a quite depth for stitching so that the stitchingstitches the sole under the upper along the contour of the sole.
 4. Thesole structure of working shoe as claimed in claim 3, wherein thegadroon is filled up with a welt, and the welt covers the stitching inthe gadroon.